Trusted by 100% of Fortune 100 Companies
Trusted by 100% of Fortune 100 Companies
and Over 85 Million Consumers Worldwide

ZoneAlarm® Free Firewall
World's #1 firewall trusted by more than 60 million.
ZoneAlarm Free Firewall

Add ZoneAlarm Free Firewall for Stronger Protection.

Quieter yet more effective, the latest ZoneAlarm Firewall Free should be considered an excellent tool...”
CNET Downloads, May 24, 2010

A ZoneAlarm Free Firewall Customer Says:

“Thanks ZoneAlarm once again you have proved you are the best free firewall solution.”
- Mike Markwick, April 2010